Gallery: Twirling Battery Provides Instant Energy for a Dead Cellphone

swinging battery, green gadget, greener gadget, cell phone battery, kinetic energy, battery

This spinning kinetic cellphone battery is a smart solution for times when your phone is dangerously low on juice. With a simple twirl of your finger, you can charge your battery with enough energy to provide a couple more minutes of talk time or a number of minutes of standby. As we gear up for the 2010 Greener Gadgets Design Competition we’re thrilled to see innovative ideas like this, so if you have a great idea for a green gadget submit it today!

Designed by Song Teaho & Hyejin Lee, the cell phone battery is recharged by simply placing it on your finger and twirling. As the diagrams indicate, twirling the battery 130 times will generate enough power to provide you 2 more minutes of talk time or 25 minutes of standby power. If a cell phone battery like this ever gets manufactured and becomes popular, expect to see the next dance craze centered around twirling your finger.

With extra research and development, clean energy charging technologies like this one, will advance even further. But until we design and manufacture greener gadgets powered by the with photovoltaics or kinetic energy, we can’t stray too far from outlet.

Via Yanko Design


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  1. Tiak January 10, 2011 at 8:34 pm


    -No reasonable number of twirls is going to recoup you the extra power that could’ve been stored conventionally if the space taken up by the dynamo and twirling gap had just had a couple of extra cells in them.

    -Incorporating the manufacture of an entirely different class of parts into a product seems likely to make the production of such a battery less green overall, especially considering nobody is going to generate more than 0.1% of their own power with one of these things.

  2. davidwayneosedach January 7, 2010 at 5:07 pm

    Very sharp! Where can I get one?

  3. hanseich January 7, 2010 at 3:45 pm

    Neat idea, but not practical I think. It looks as if you loose about 1/2 the space that could otherwise be occupied for bigger cells, that will last much longer in the first place. Also, the phone will have to be turned off, take battery out, but back in, turn on (lots of power used to power the phone back up) and then used for some time. How about integrating this into the phone and not the battery. You can probably integrate small PV or even a kinetic charger (with a shaking motion, or like the old watches) directly into the phone. You’ll be able to charge the phone while it’s still one, or while in everyday regular use (in case of the PV even when it is just sitting there).

    Just my few pennies :-)

    Cheers, Hans

  4. mattymatt January 7, 2010 at 2:08 pm

    Seems a bit unwieldy — what’s to stop it from twirling off the top of your finger?

  5. mind power January 7, 2010 at 10:33 am

    This is such a great invention and I am sure there will be many more users for it.

    My son has a flashlight that works similar to this, you shake it to power it up, it also lasts for quite a long time with just a few shakes.


  6. Sammy January 6, 2010 at 6:07 pm

    Two extra minutes can help you call for help in case of an emergency.

  7. Kirsten Corsaro January 6, 2010 at 11:48 am

    That’s cool, but seems like a lot of work just to get 2 more minutes of talk time. I wonder if there’s a way for a battery to get extra charge by absorbing movement as the phone is used, or even by somehow absorbing energy from the sound waves as people talk….?

  8. ModernEcoHomes January 6, 2010 at 11:31 am

    What an ingenious idea, especially for those of us sitting at a desk all day. Charge and have fun! Love it.

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